| INFRASTRUCTURE MANAGERS LIMITED ACTIVE | Secretary | 05 Aug 2005 | | | | 8th Floor, 6 Kean Street, London, WC2B 4AS, United Kingdom |
| DAKPOE, Prince Yao ACTIVE | Director | 01 Apr 2024 | | United Kingdom | December 1979 | Infrastructure Managers Limited, 2nd Floor Drum Suite, Saltire Court, 20 Castle Terrace, Edinburgh, EH1 2EN, United Kingdom |
| EDWARDS, Matthew James ACTIVE | Director | 14 Nov 2023 | | United Kingdom | February 1985 | 8th Floor, 6 Kean Street, London, WC2B 4AS, United Kingdom |
| BARBER, David Alan RESIGNED | Secretary | 08 Apr 1999 | 02 Jan 2003 | | | 14 Pinewood Gate, Harrogate, North Yorkshire, HG2 0JF |
| CHETTLEBURGH INTERNATIONAL LIMITED RESIGNED | Nominee Secretary | 08 Apr 1999 | 08 Apr 1999 | | | Temple House, 20 Holywell Row, London, EC2A 4JB |
| NOBLE FINANCIAL HOLDINGS LIMITED RESIGNED | Secretary | 02 Jan 2003 | 30 Sep 2003 | | | 76 George Street, Edinburgh, EH2 3BU |
| NOBLE PARTNERSHIP LIMITED RESIGNED | Secretary | 30 Sep 2003 | 05 Aug 2005 | | | 76 George Street, Edinburgh, EH2 3BU |
| ASHBROOK, Philip Peter RESIGNED | Director | 25 Jul 2014 | 29 Jun 2018 | England | May 1960 | 2nd Floor, 11 Thistle Street, Edinburgh, EH2 1DF, United Kingdom |
| AUSTIN, Robert John RESIGNED | Director | 08 Apr 1999 | 02 Jan 2003 | United Kingdom | July 1964 | Romiley House, Station Road, Oakworth, Keighley, West Yorkshire, BD22 7RE |
| CAVILL, John Ivor RESIGNED | Director | 25 Jan 2016 | 01 Apr 2024 | England | October 1972 | Cannon Place, 78 Cannon Street, London, EC4N 6AF, United Kingdom |
| CHAPLIN, Robert Henry Moffett RESIGNED | Director | 31 Oct 2000 | 05 Sep 2001 | United Kingdom | April 1963 | 23 Moray Place, Edinburgh, Lothian, EH3 6DA |
| CLAPP, Andrew David RESIGNED | Director | 01 Aug 2010 | 07 Sep 2012 | United Kingdom | March 1975 | Northwest Wing, Bush House, Aldwych, London, WC2B 4EZ |
| CLARKE, Laurence Seymour RESIGNED | Director | 19 Mar 2009 | 01 Aug 2010 | England | June 1972 | Barclays Bank Plc, 1, Churchill Place, London, E14 5HP |
| COPLEY, Peter Paul RESIGNED | Director | 07 Sep 1999 | 02 Jan 2003 | England | July 1956 | 113 Shepherds Lane, Dartford, Kent, DA1 2PA |
| ECKERSALL, Gary Irvine, Mr. RESIGNED | Director | 09 Oct 2000 | 05 Sep 2001 | United Kingdom | February 1964 | 16 Valley Road, Braintree, Essex, CM7 9BJ |
| HOILE, Richard David RESIGNED | Director | 11 Jul 2012 | 25 Jul 2014 | United Kingdom | December 1963 | Northwest Wing, Bush House, Aldwych, London, WC2B 4EZ |
| JESSOP, Alan Dixon RESIGNED | Director | 31 Oct 2000 | 01 Jun 2001 | | September 1955 | 73 Cricketers Lane, Brentwood, Essex, CM13 3QB |
| MCCULLOCH, Paul RESIGNED | Director | 05 Sep 2001 | 12 Feb 2004 | | May 1965 | 33 Southwood Avenue, Highgate, London, N6 5SA |
| MCDONAGH, John RESIGNED | Director | 13 Mar 2006 | 19 Mar 2009 | | December 1969 | 30 St Botolph's Road, Sevenoaks, Kent, TN13 3AG |
| MIDDLETON, Nigel Wythen RESIGNED | Director | 23 Jul 2004 | 13 Mar 2006 | United Kingdom | November 1956 | The Cottage, 198 High Molewood, Hertford, SG14 2PJ |
| PHILIPSZ, Joseph Eugene RESIGNED | Director | 31 Oct 2000 | 05 Sep 2001 | United Kingdom | December 1967 | 3 Blinkbonny Grove, Edinburgh, Midlothian, EH4 3HH |
| RAY, Alistair Graham RESIGNED | Director | 05 Sep 2001 | 23 Jul 2004 | | November 1974 | 305 Rotherhithe Street, London, SE16 5EQ |
| RYAN, Michael Joseph RESIGNED | Director | 12 Feb 2004 | 19 Mar 2009 | United Kingdom | April 1966 | Apartment 42,, Central Building, 3 Matthew Parker Street, London, SW1H 9NE |
| RYAN, Michael Joseph RESIGNED | Director | 31 Oct 2000 | 01 Jun 2001 | United Kingdom | April 1966 | Apartment 42,, Central Building, 3 Matthew Parker Street, London, SW1H 9NE |
| SCOTT-BARRETT, Nicholas Huson RESIGNED | Director | 23 Jul 2004 | 13 Mar 2006 | | July 1950 | Gatehouse Farm, Crown Lane, Ardleigh, Colchester, CO7 7QZ |
| SEARCH, Annabel Shirley RESIGNED | Director | 08 Apr 1999 | 09 Oct 2000 | | July 1963 | Old Orchard House Church Street, Goldsborough, Knaresborough, North Yorkshire, HG5 8NR |
| SHELDRAKE, Peter John RESIGNED | Director | 29 Jun 2018 | 14 Nov 2023 | England | April 1959 | Cannon Place, 78 Cannon Street, London, EC4N 6AF, United Kingdom |
| TAEE, Nigel Duncan RESIGNED | Director | 07 Sep 1999 | 05 Sep 2001 | England | February 1961 | Scarlet Hollies, Pinewood Road, Wentworth, Surrey, GU25 4PA |
| BIIF CORPORATE SERVICES LIMITED RESIGNED | Director | 31 Mar 2009 | 25 Jan 2016 | | | Cannon Place, 78 Cannon Street, London, EC4N 6AF, United Kingdom |